Optical fiber composite cross-linked power cable

Abstract

The invention discloses an optical fiber composite cross-linked power cable, which comprises a cable core, wherein the cable core is formed by twisting two tubular inner conductors, two insulated wire cores and an optical fiber; a packing layer is arranged in a gap of the cable core; a taping layer coats the outside of the cable core; two shielding layers are arranged outside the taping layer in an extruded manner; a compressive metal tube is arranged between the two shielding layers; and an outer sheath is arranged at the outermost layer in the extruded manner; a galvanized steel wire strengthen core is arranged at the center in each inner conductor; an isolating layer is arranged outside each galvanized steel wire strengthen core; and the optical fiber in the cable core is located between the insulated wire cores with a small structure. The optical fiber composite cross-linked power cable has the characteristics of high self-bearing capacity and compressive property, good moisture resistance, air-tightness and shielding property, low-temperature resistance, distortion resistance, long service lifetime and the like.

Description

technical field [0001] The invention belongs to the field of power cables, and in particular relates to an optical fiber composite cross-linked power cable. Background technique [0002] Cross-linked polyethylene (XLPE) cables have a history of 40 years since their inception. At present, in the 10kV ~ 35kV system of the domestic urban network, most of the cables used underground are ordinary XLPE insulated cables. Generally, a large number of water trees will grow after 8 to 12 years of operation, causing a large number of XLPE cables to cause accidents due to water tree breakdown. , short life, affecting the safe operation of the power grid. [0003] Therefore, since the discovery of the water tree discharge phenomenon of cross-linked cables, there has been an upsurge in the research on water tree discharge of cross-linked cables in the world. Water trees are microchannels that develop in the insulation in the presence of moisture, electrical stress and certain inducing f...

AI Technical Summary

Problems solved by technology

Due to the limitation of the manufacturing length of long cables in ocean and sea islands, there are many cable joints, high quality risks, and high watertight performance requirements, which bring more inconvenience to installation, use and maintenance, and directly affect the service life.

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